They both use the same round, same cycle rate, even looks mostly the same. The first one is illegal in Canada. As for the second one, anyone with a valid PAL can buy one in any Canadian gun store, and are quite popular from what I understand. They are not available in the US, and make specifically for the Canadian market.
This video explains Canada's magazine capacity laws in sections four and five.
http://www.rcmp-grc.gc.ca/cfp-pcaf/bulletins/bus-ent/20110323-72-eng.htm

You mistake being repulsed with being skeptical about the social value vs the probable blow back based on experience. When it was reintroduced in 2008, there were no Democratic co sponsors. I had a Republican sponsor and four Republican co sponsors. Why?